Stove for steam bathrooms



Filed Dec. 29, 1947 Aug. 28, 1951 T BRODAHL STOVE FOR STEAM BATHROOMPatented Aug. 28, 1951 STOVE FOR STEAM BATHROOMS Tryg've Brodahl,Storjordet, Honefoss, Norway Application December 29, 1947, Serial No.794,372 In Norway March 13, 1943 \Section 1, Public Law 690, August 8,1946 Patent expires March 13, 1963 3 Claims.

This invention relates to improvements in stoves for steam bath-rooms ofthe type having a container above the combustion chamber for containingheat accumulating material, such as stones, which upon admission ofwater thereto generate superheated steam.

The object of the invention is to provide a stove of the above mentionedtype which ensures an increased circulation of the bath-room air, a moreintimate contact between such air and the heat emitting surfaces of thestoves and between such surfaces and the combustion gases and the stonecontainer provided in the stove, whereby the body of stones becomes soheated that an effective generation of steam may take place.

The invention is characterised in that the container is of substantiallypear shaped cross section and the upper end portions of the side wallsof the housing converge parallel thereto whereby relatively narrowoutlet channels of uniform cross section are formed between the walls ofsaid housing and container, and said channels meeting at the top of thehousing towards the outlet for the combustion gases.

In order that the invention may be more clearly understood oneparticular embodiment thereof will now be described by way of example,with reference to the accompanying drawing wherein:

Figure 1 is a front view of the stove,

Figure 2 is a side view thereof,

Figure 3 is a vertical cross section along the line IIIIII in Figure 2,and

Figure 4 is a vertical longitudinal section through a modifiedembodiment of the stone container.

In the drawing 1 and 2 indicate the two end walls of the stove, whichare provided with legs and preferably have detachable top portions 1,,2' for giving access to the inside of the stove and thus facilitatereplacing or exchanging of parts. Between said end walls i and 2 ismounted a housing 3 forming a combustion chamber 9, which in verticalcross section has a round shape at its lower end and widens uniformly upto about two thirds of its height, above which its width again decreasesuniformly so that the housing terminates in converging side walls in atapered portion 3' at the top. The housing may be provided with usualsurface ribs IT as shown.

A container 4 for heat retaining solid material. such as stones l8,arranged in the top part of the housing 3 above the combustion chamberhas converging side walls and is of pear-shaped cross section, so thatbetween said container 4 and the adjacent walls of the housing 3 thereare formed relatively narrow channels 5 of uniform cross section for thecombustion gases. At the top of the housing 3 is an outlet 6, preferablyarranged on the longitudinal axis of the stove.

At some distance above the bottom of the housing 3 is provided a grate lbounding off an ash pit 8 from the combustion chamber 9- situated aboveit, access being had to these chambers 8 and 9 in usual manner throughdoors Ill and H respectively provided in one end wall 2. 1

One end 4 of the container 4 is open and connected to the end wall 2,and the other end thereof rests upon brackets l2 secured to the otherend wall I, the length of the container preferably being somewhat lessthan the distance between said end walls, so that a narrow channel, I3for combustion gases is formed between the rear end wall 4' of thecontainer and the end wall I.

The end wall 2 is provided with one or more relatively large slottedopenings 14 which open from the interior of the container 4 to enablethe issue of super-heated steam, which is obtained by admitting water tothe heated stones or other material through a tube l5, which isintroduced into the container and extends longitudinally near the top orapex thereof.

In the embodiment of the stove described above the combustion gases fromthe chamber 9 flow upwardly through the channels 5 at each side of thecontainer 4 with negligible resistance due to the uniform cross sectionof said channels, and due to the relatively narrow cross section thereofthe gases will also attain considerable velocity whereby an intensetransmission of heat from the gases to the channel bounding surfaces ofthe housing 3 and the container 4 is obtained.

Due to the upwardly tapered shape of the container 4 soot and ashes isprevented from accumulating thereon and of thus preventin the passage ofthe gases or an effective heat exchange. The shape of the container 4also p11); vides for a more effective generation of steam, because thewater introduced at the top of the container will be more uniformlydistributed over the walls of the container and the heated body ofstones or other material.

The air in the bath-room will, due to the streamline shape of the outersurface of the housing, flow upwardly in intimate contact with saidsurface without formation of eddies, and in combination with theincreased issue of heat from the housing 3, due to the arrangement ofthe channels 5, a highly increased circulation of well one or morevertical through channels or ducts l6, as illustrated in Figure 4, thecross 'sectionsof which ducts decrease towards the top of :the con-'-tainer, where their width is so small that only:

the amount of gas necessary for heating of the her in the lower portionof said housing; a container arranged in the upper portion of saidhousing and having also converging side walls being parallel to saidconverging side wall portions of said housing and being spaced therefromsaid container being open at one end; relatively narrow outlet :channelsof uniform cross section formed'between said converging side wallportions .ofsaid housing and said converging sid walls of container,said container may beprovided' with 5'."-

interior layers of the body of stones "can pass "facing and connected tosaid end wall so as to through. When the container is provided with suchducts l6, two jet tubes [5 are preferably ari ranged, eachextending}?longitudinally of the containeron eachv side of :the ducts. l

The above arrangements-overcome -the :previouslyexperiencedudisadvantage of stoves of'this type, which was thatt-he'body of stones. became insuflicie'ritly heated to 'ploduce thedesiredsuperheated'-steam.-

I'claim: v e

1. A wstove ior'a'steam bathroom'comprising in combination-a housingcomposed .of two opposite end walls having-detachable 'upperendwallarranged in said "container; tube means- :for in-- troducingwa'terinto said =container--so that the same contacts said heat retainingmaterial "when introduced into said container andlcreatessteam within"said container; aebracket-mounted on one of said opposite end walls;said open end of said container-being connected to the :detachable upperend wall portion of the other of -saidoppo-- site end-walls; saidcontainer resting-wheninserted into saidhousing -on .said bracket andforming between its rearwa-ll and :theadjacent detachable upper end wal1*portionofsaid :housing a re'lat-ively narrow rise channel forthe-combustion gases; and 'means-in=said -.detachable upper end-p0rtionof said other oi said opposite end walls fordischarging said steam fromsaid container.----- r g 2. A stove for a steam bathroomcomprisingincombination a housing composed of two opposite end walls and two sidewalls having upper converging sidewall portions; a combustion chamsaidcontainer; heat retaining solid material arranged' ini'said container;tube means for introducing water into said container so that the samecontacts said heat retaining material when introduced-into saidcontainer and creates steam within'said container; slotted openings inone of said end walls; means for securing said container to the'lastmentioned end wall with its open end permitiescape of steam from saidcontainer through said slotted openings; and means on the other of saidend walls for supporting said container within said housing.

. 3. A stove for a steam bathroom comprising in combination a housingcomposed of two opposite.

end walls and two side walls having upper converging side wall portions;a combustion chamber in the lower portion of said-housing; a containerarranged the upper portion ofsaid housing and having also convergingside walls being parallel-tosaid converging side wall portions of saidhousing and being spaced therefrom; relatively narrow outlet channels ofuniform cross section formed between saidconverging side wall portionsof said housing and said converging side walls ofsaid container; heatretaining solid material arranged in said container; tube means forintroducing-water into-saidcontainer so that the same contacts said heatretaining material when introduced=into said container and creates steamwithinsaid container; at least one gas duct extending vertically throughsaid container and having a cross section decreasing towards" the top ofthe same; and means for discharging the steam created withinsaidcontainer.

' TRYGVE BRODAHL.

REFERENCES CITED The following references :are of record inthe.

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